help with toro dingo 323

[JLAWNCARE]

I have a toro dingo 323 I want to change hydraulic but do not no what type of hydraulic oil to use,it is not in owners manual called toro no help local dealer said 15-40 mobil 1 but it does not seem right

[Landrus2]

10/40 M1 motor oil sounds right what part don't feel right to you